Features: magnetic stir bar can resist high temperatures, corrosion, abrasion and high rotational forces, and has the properties of fine workmanship, no impurities and burrs on the surface, stable speed and no deviation Quality material: PTFE magnetic stirrer is made of PTFE and quality magnetic steel, and the cylindrical shape and smooth surface will reduce friction and improve smooth rotation More other applications: laboratory bar is widely applied in scientific research, universities, laboratories in the industrial and agricultural sectors, and also can be applied to stir mixed substances Widely applicable: stir plate magnet bar will work well with types of magnetic stirrers or heating stirrers How to use: you can place inside a container of liquid or solution that is seated on a magnetic stirrer, and use a rotating magnet or multiple stationary electromagnets to create a rotating magnetic field Features: the laboratory bar has acid and stability as well as organic solvent tolerance, and is almost insoluble in solvents; The maximum temperature is 250 degrees centigrade and the minimum temperature is -196 degrees centigrade Quality material: the rod magnetic mixer is made of quality PTFE, and its cylindrical shape and smooth surface will reduce friction and improve smooth rotation, nice for laboratory Colour:White Material:PTFE Size:8 x 30mm Package Contents: 4 x magnetic stir bar Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.